<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body></body>
</html>

<script>
  function map(arr) {
    var Arrnew = arr.map(function (item) {
      return item * 1.3;
    });
    return console.log(Arrnew);
  }

  arr = [10, 20, 30, 40, 50];
  map(arr);
</script>
